Paul sets off from picturesque Grosmont towards Goathland, where he fires up an 88-year-old engine, discovers the secrets of traditional signal boxes and learns about a groundbreaking mission.
We soak in the scenery from Goathland to Levisham, the iconic engine 'Tornado' goes on a mission, and the lineside team are in action monitoring the UK's only venomous snake.
We travel from Whitby to Grosmont in time for the railway's steam gala. A 60-tonne locomotive is transported 300 miles from the Isle of Wight to Yorkshire. And walkers take on 'the rail trail'.